JPH0322560B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heat exchanger, and more particularly to a heat exchanger with a longitudinal buffle suitable for heat exchange of relatively high temperature and high pressure fluid.

[Prior art]

Generally, a heat exchanger having a longitudinal butthole is composed of a shell body 1, a shell cover 2, and a channel 3, as shown in FIG. For example, a shell side fluid passage with a circular cross section is divided into two from the center into a low temperature fluid passage 6 and a high temperature fluid passage 7 with a semicircular cross section, and a low temperature fluid inlet 8 provided in the shell body 1 is provided. The shell side fluid A that entered the low temperature fluid passage 6 from the longitudinal baffle 5
The heated fluid B enters the high temperature fluid passage 7 at the tip thereof and is discharged from the high temperature fluid outlet 9.
In the process of passing through the tube group 10, heat exchange occurs. 11 is a floating head, 12 is a floating tube plate, and 13 is a buttful.

By the way, when performing heat exchange at a high temperature and with a large temperature difference in a heat exchanger having such a configuration,
Thermal stress is generated in the shell body 1, the flange, etc., and the strength of the material is further reduced due to the high temperature, so it is necessary to increase the strength of these materials. the result,
As the weight of the heat exchanger itself increases, the manufacturing cost also increases.

Further, although the high temperature fluid passage 7 side and the low temperature fluid passage 6 side are partitioned by a seal plate 21, this seal plate 21 cannot prevent leakage from the low temperature fluid side to the high temperature fluid side, resulting in heat loss. As a result, the heat transfer effect was reduced.

[Purpose of the invention]

The present invention has been made to solve the above problems, and its purpose is to reduce the thermal stress occurring in the heat exchanger, to enable the use of thin materials, and to improve the heat exchanger's performance. The aim is to reduce weight and manufacturing costs, and also to improve heat transfer efficiency.

[Summary of the invention]

In order to achieve the above object, the present invention disposes a longitudinal buffle attached to a fixed tube plate within the shell main body, and divides the fluid passage on the shell side into a low-temperature fluid passage and a high-temperature fluid passage by the longitudinal buffle. An inner half shell is disposed within the hot fluid passage to form a half-ring cold fluid passage, and each of the cold fluid passage and the half-ring cold fluid passage communicates with the hot fluid passage at a longitudinal baffle tip. The low-temperature fluid passage and the half-ring-shaped low-temperature fluid passage communicate with each other through slits provided on both sides of the fixed tube sheet side of the longitudinal baffle, and the low-temperature fluid inlet is connected to the shell body on the fixed tube sheet side, and the low-temperature fluid inlet is connected to the inner half of the shell body on the fixed tube sheet side. It is an object of the present invention to provide a heat exchanger in which each shell is provided with a hot fluid outlet.

〔Example〕

An embodiment of the heat exchanger according to the present invention will be described below with reference to FIGS. 1 to 3.

Fig. 1 is a side sectional view of the heat exchanger, Fig. 2 is a view taken along the Y-Y arrow in Fig. 1, and Fig. 3 is a view taken along the X-X arrow in Fig. 1. The same symbols as in Figure 4 indicate the same names.

A longitudinal baffle 5 attached to a fixed tube plate 4 is disposed inside the shell body 1, and divides the shell side fluid passage into a low temperature fluid passage 6 and a high temperature fluid passage 7. A circular inner half shell 14 is disposed, and a half ring-shaped cold fluid passage 15 is formed. A plurality of spacers 16 are installed alternately between the inner half shell 14 and the shell body 1, and the low temperature fluid A flowing through the half-ring shaped low temperature fluid passage 15 moves up and down inside the shell body 1. Due to the cross-section 13 provided so as to cross the flow, the flow flows in a zigzag pattern when viewed from the longitudinal direction. The semi-ring-shaped low temperature fluid passage 15 and low temperature fluid passage 6 communicate with the high temperature fluid passage 7 at the tip of the longitudinal buffle 5, respectively. The semi-ring shaped fluid passage 15 and the low temperature fluid passage 6 are configured to communicate with each other through slits 17 (FIG. 3) provided on both sides of the longitudinal baffle 5 on the fixed tube plate 4 side. 18 is a high temperature fluid outlet provided in the inner half shell 14, and 21 is a seal plate made of a plurality of metal plates attached to the side end surface of the longitudinal buffle 5.

[Action of the invention]

In the heat exchanger having such a configuration, when the low-temperature shell-side fluid A is supplied into the shell main body 1 from the low-temperature fluid inlet 8, it flows in a meandering manner in the low-temperature fluid passage 6 in the direction of the arrow a; As shown in FIG.
flows into the semi-ring-shaped cold fluid passage 15 from
Flows in the direction of arrow a′. When it reaches the tip of the longitudinal buffle 5, it passes through the high-temperature fluid passage 7 and is discharged from the high-temperature fluid outlet 18 to the outside of the shell body 1. Of course, in this process, the high-temperature heated fluid B flows through the tube group 10 from the high-temperature fluid inlet 19, undergoes heat exchange therein, becomes a low-temperature fluid, and is discharged from the low-temperature fluid outlet 20.

It is obvious that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the spirit thereof.

〔Effect of the invention〕

As is clear from the above description, the heat exchanger according to the present invention has a longitudinal baffle 5 attached to a fixed tube plate 4 disposed within the shell body 1, thereby connecting the fluid passage on the shell side to the low temperature fluid passage 6 and the high temperature fluid passage. The high temperature fluid passage 7
An inner half shell 14 is disposed inside, and the inner half shell 14 and the shell main body 1 form a half-ring-shaped low-temperature fluid passage 15.
are configured to communicate with the high-temperature fluid passage 7 at the tip of the longitudinal buffle 5, respectively, and the low-temperature fluid passage 6 and the half-ring-shaped low-temperature fluid passage 15 are provided on both sides of the longitudinal buffle 5 on the fixed tube plate 4 side. This heat exchanger is characterized in that a low-temperature fluid inlet 8 is attached to the shell body 1 on the fixed tube plate 4 side, and a high-temperature fluid outlet 18 is attached to the inner half shell 14.

Therefore, according to the present invention, the inner half-shell 14 is provided in the high-temperature fluid passage 7, and the half-ring-shaped low-temperature fluid passage 15 is formed by the shell body 1 and the inner half-shell 14. A large thermal stress is not generated in the main body 1, the flange portion, etc., and there is no contact with high temperature fluid.

As a result, the heat exchanger can be made relatively light in structure, and manufacturing costs can be reduced. In addition, since leakage from the low temperature fluid passages 6, 15 to the high temperature fluid passage 7 can be prevented, the heat transfer effect can be improved. This is particularly effective when heat exchange is performed at high temperature, high pressure, and with a large temperature difference.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the heat exchanger according to the present invention, in which FIG. 1 is a side sectional view of the heat exchanger, and FIG. 2 is a view taken along the Y-Y arrow in FIG. 1. 3 is a view along the line X--X in FIG. 1, FIG. 4 is a sectional side view of a conventional heat exchanger, and FIG. 5 is a view along the line C--C in FIG. 4. 1...Ciel body, 2...Ciel cover, 3...
... Channel, 4 ... Fixed side tube plate, 5 ... Longitudinal buttful, 6 ... Low temperature fluid passage, 7 ... High temperature fluid passage, 8 ... Low temperature fluid inlet, 9, 18 ... High temperature fluid outlet, 10 ... Tube group, 11... floating head, 12...
Floating tube plate, 13...boutful, 14...inner half shell, 15...half ring-shaped cold fluid passage, 16...spacer, 17...slit.

Claims (1)

[Claims] 1 A longitudinal baffle attached to a stationary side tube plate is disposed within the shell body, and the longitudinal buffle divides the fluid passage on the shell side into a low temperature fluid passage and a high temperature fluid passage, and an inner half shell is disposed within the high temperature fluid passage. are arranged to form a half-ring-shaped low-temperature fluid passage, and each of the low-temperature fluid passage and the half-ring-shaped low-temperature fluid passage is configured to communicate with the high-temperature fluid passage at a longitudinal baffle tip, and the low-temperature fluid passage and The semi-ring-shaped low temperature fluid passages communicate through slits provided on both sides of the fixed tube sheet side of the longitudinal buttful, and a low temperature fluid inlet is installed in the shell body on the fixed tube sheet side, and a high temperature fluid outlet is installed in the inner half shell. A heat exchanger characterized by: